Half to john wagner



(No Model.)

6 A. U. GRUMMANN.

ELEVATOR GATE.

No. 366,625. Patented July 12, 1867. 6 -r Ufl 19- W W WITNESSES.

4f 4, @M i v NITED STATES PATENT OFFICE.

ALBERT U. GRUMMANN, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE- HALF TO JOHN W'AGNER, OF SAME PLACE.

ELEVATO R-GATE.

SPECIFICATION forming part of Letters Patent No. 366,625, dated July 12, 1887. Application filed March 12, 1887. Serial No. 230,626. (NO IllOdGlJ To aZZ whom it may concern.-

Be it known that I, ALBERT U. GRUMMANN, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Elevator Gates, of which the following is a specification.

The object of my said invention is to pro duce an elevatorgate which may be easily and quickly placed in position alongside elevators already constructed, in such relation thereto as to be operated thereby without any modification on reconstruction of the elevator or adjacent portions of the building. This object is accomplished by mounting a gate constructed of loosely-pivoted parts upon a post secured to the floor, securing a spring or similar device to the floor in such relation to the elevator that it will be moved somewhat by said elevator in passing up and down, and passing a rod pivoted to the gate through or alongside said spring or device, in such relation that when said spring or device is moved by the elevator in passing, it will impinge upon said rod and serve as a frictionbrake, whereby through said rod said gate may be held in elevated position at such times, but permitted to fall down in front of the hatehway at other times, as will be hereinafter more particularly described and claimed.

Referring tothe accompanying drawings,

which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a view looking downwardly from the dotted line 1 1 in Fig. 2, showing the gate, elevator-platform, and adjacent parts in plan; Fig. 2, a view looking upwardly from the dotted line 2 2 in Fig. 1, showing the same parts in elevation; Fig. 3, a detail sectional view, on an enlarged scale, looking toward the right from the dotted line 3 3; Fig. 4, a view, similar to Fig. 2, of an alternative construe tion; Fig. 5, a horizontal sectional view looking downwardly from the dotted line 5 5 in Fig. 4; and Fig. 6,- a detail sectional view, on an enlarged scale, looking toward the right from the dotted line 6 6.

In said drawings, the portions marked A represent the floor, posts, and stationary parts about the elevator; B, the platform and other parts of the elevator; O, the post upon which my improved gate is mounted, and which forms in effect part thereof; D, the rails and slats forming the remainder of said gate; E, 'a rod attached to said gate, and F the spring or brake device, through or alongside which the rod passes.

As before indicated, the elevator is not intended to be changed at all in construction when my invention is used therewith, but may be any ordinary elevator, and consequently the portions marked A and B and the other parts of the elevator proper need no special description, except such as is givenincidentally in describing the invention.

The post 0 may be of any form or style desired which is appropriate for the purpose; but I prefer to form it of cast-iron, and, as shown, quite thin,with a rib which strengthens it. To this post the rails D of the gate are connected by means of pivot-bolts 0. One of said rails (the upper one is so shown) may extend out somewhat, so as to partially counterbalance the gate. This gate, when in use, occupies the position shown in the drawings in full lines; but when it is desired to use the elevator the gate is thrown up out of the way into the position indicated by the dotted lines.

The railsD of the gate are generally of wood, that being the most suitable material for the purpose, and there may be several rails and a single slat, as shown most plainly in Fig. 2, or two rails and several slats, as shown most plainly in Fig. 4, according to the taste of the builder. The cross bar or slat nearest the free end of the gate should be provided with a buffer, (1, of rubber or leather, so that the shock or jar when the gate falls will be taken up or relieved somewhat.

The rod Eis pivoted to one of the bars I) of the gate, and runs either down through the hatchway alongside the elevator-platform, as shown in Figs. 1, 2, and 3, or along the floor, preferably in a groove, as shown in Figs. 4, 5, and G. In either case it runs through or alongside a spring or other brake device, F, secured to the floor, which permits it to pass freely when the elevator-platform is above or below, but which, when the elevator-platform is brought to or near a level with the floor, is moved by said elevator-platform against said force of its fall.

rod and impinges thereon with a suffieient degree of force to hold said rod to the position it occupies, and thus hold the gate 11p after it has been pushed to that position by hand, which is the usual way of raising the gate.

The spring F (shown in. the principal construction) has a hole in it, through which the rod E passes, and said rod is inclined somewhat, particularly in its upper portion, so that as the gate descends, before it reaches closed position, the rod will impinge on the side of the hole in said spring,'aud thus serve to retard the movement of the gate and break the The spring, being preferably of flat thin metal, will yield somewhat and permit the complete closing of the gate, notwithstanding that the rod comes in contact therewith before it is entirely closed, said spring being thereby pulled somewhat to one side by said rod. This feature may be best understood by an examination of Fig. 3.

When the construction shown in Figs. 4, 5, and 6 is employed, the rod Ecan be continued entirely across in front of the elevator to the opposite side from the post in a groove provided for the purpose, and the operator, who is raising or lowering the elevator by means of a 1'ope,(which usually hangs at that side,) may, by stepping on said rod, hold the gate up when the elevator-platform is not in position to do it, and thus .keep the gate out of his way in doing this work.

Having thus'fully described my said invention,wliat I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a pivoted elevatorgate, a rod pivoted to said gate at one end, and a spring or brake device secured to the floor, the free end of said pivoted rod being arranged to extend down and into loose contact with said spring or brake device, and said spring or brake device being arranged to be operated by the passage of the elevator to impinge upon said rod and secure it from moving, whereby said elevator-gate may be held in the desired position, substantially as set forth.

2. The combination of an elevatorgate consisting of bars pivoted to a post and adapted to be raised and lowered on said pivots, a spring or brake device secured to the floor, and a rod pivoted to said gate and passing down through said spring or brake device, said rod and said spring being'so arranged in relation to each other that as the gate descends said rod will impinge on one side of the opening through which it passes, and thus retard or break the fall of the gate, substantially as set forth. a

In witness whereof" I have hereunto set my handand' seal, at Indianapolis, Indiana, this 8th day of March, 'A. D. 1887.

ALBERT U. GRUMMANN. [a s.]

In presence of O. BRADFORD, PAUL H. GRUMMANN. 

